Talk:Chemical ionization: Difference between revisions
regarding ASMS Terms and Definitions Poster |
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Jean-Fran??????????????ois GAL?????????????? | Jean-Fran?***?*?**??****?*??***?*?**?**?*??ois GAL?***?*?**??***?*?***?*??***?*?**?**?***** | ||
02-28-2004 10:57 AM ET (US) | 02-28-2004 10:57 AM ET (US) | ||
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''Chemical ionization - Method in which neutral molecules are ionized by ion-molecule reactions to generate a parent ion at a pressure of about 1 torr'' | ''Chemical ionization - Method in which neutral molecules are ionized by ion-molecule reactions to generate a parent ion at a pressure of about 1 torr'' | ||
Jean-Fran??????????????ois GAL?????????????? | Jean-Fran?***?*?**??****?*??***?*?**?**?*??ois GAL?***?*?**??***?*?***?*??***?*?**?**?***** | ||
03-06-2004 09:51 AM ET (US) | 03-06-2004 09:51 AM ET (US) | ||
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Dave Parees?????????????? | Dave Parees?***?*?**??***?*?***?*??***?*?**?**?***** | ||
03-08-2004 02:33 PM ET (US) | 03-08-2004 02:33 PM ET (US) | ||
Do we want to distinguish between so-called "self-CI" which can occur at much lower pressures, CI in an ion trap, which is also done at much lower pressures, but much longer residence times, and "normal" CI? Also, I'd say the definition, as written, even if applied only to "normal" CI is ambiguous, in that the pressure refers to the "reagent" gas, not the analyte pressure, which should be orders of magnitude lower. | Do we want to distinguish between so-called "self-CI" which can occur at much lower pressures, CI in an ion trap, which is also done at much lower pressures, but much longer residence times, and "normal" CI? Also, I'd say the definition, as written, even if applied only to "normal" CI is ambiguous, in that the pressure refers to the "reagent" gas, not the analyte pressure, which should be orders of magnitude lower. | ||
Latest revision as of 11:50, 11 March 2024
Jean-Fran?***?*?**??****?*??***?*?**?**?*??ois GAL?***?*?**??***?*?***?*??***?*?**?**?***** 02-28-2004 10:57 AM ET (US)
I suggest that "cationization" be defined. I mean the addition of a cation (from a metal in general) is added to a neutral molecule.(It follows that "anionization" should be invented for the adduct formation with an anion.) I think that this process is not covered by the definition of chemical ionization.
regarding ASMS Terms and Definitions Poster
Chemical ionization - Method in which neutral molecules are ionized by ion-molecule reactions to generate a parent ion at a pressure of about 1 torr
Jean-Fran?***?*?**??****?*??***?*?**?**?*??ois GAL?***?*?**??***?*?***?*??***?*?**?**?***** 03-06-2004 09:51 AM ET (US)
ion/molecule 1 torr = 133 Pa
Dave Parees?***?*?**??***?*?***?*??***?*?**?**?***** 03-08-2004 02:33 PM ET (US)
Do we want to distinguish between so-called "self-CI" which can occur at much lower pressures, CI in an ion trap, which is also done at much lower pressures, but much longer residence times, and "normal" CI? Also, I'd say the definition, as written, even if applied only to "normal" CI is ambiguous, in that the pressure refers to the "reagent" gas, not the analyte pressure, which should be orders of magnitude lower.
